/Engine/Source/Runtime/UMG/Public/Blueprint/SlateBlueprintLibrary.h
Translates local coordinate of the geometry provided into local viewport coordinates.
static void LocalToViewport ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContextObject, const [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) & Geometry, FVector2D LocalCoordinate, FVector2D & PixelPosition, FVector2D & ViewportPosition )